Corner bead and method of manufacturing same



4 Sheets-Sheet l M. G. vAss Filed Feb. 27, 193s CORNER BEAD AND METHOD OF MANUFACTURING SAME July 13, 1937.

July 13, 1937. M. G. vAss CORNER BEAD AND-METHOD OF MANUFACTURING `SAME Filed Feb. 27, 19C .4 Sheets-Sheet 2 BY/d//Q ATTORNEY July 13, 1937. M. G. vAss 2,086,886

CORNER BEAD AND METHOD OF MANUFACTURING SAME Filed Febn 27, 1933 4 Sheets-Sheet 3 M. G. VAss July 13', 1937.

. CORNER BEAD AND METHOD 0F MANUFACTURING SAME 4 Sheets-Sheet 4 Filed Feb. 27, 1953 ATTORNEY;

` v.Patented July 1 3, 1937 CORNER BEAD AND METHOD or MANU- FAcTUmNc SAME Michael G. Vas-s, .Maywood, lll., assignor to y United States Gypsum Company, Chicago, Ill., l a corporation of Illinois y .Application February 27, 1933, serial No. 658,713 7 claims. (o1. 113-112) This,v invention relates to metallic reinforcement used in building constructions or thelike, and has-reference vmore particularly to metal corner beads to be embedded in plaster at the `Vcorners of rooms and theV manufacture of the same.

In the manufacture of metal corner beads, it is customary to form thesamel from a unitary blanlgthe tubular or other shape nose of the cornerbead being formed integral with angular wings of `perforated metal. With this type of corner bead', the cost of manufacture is excessive and the bondof the plaster adjacent the usual unexpanded portions of the Wings Where the same are integrally connected to the nose is sometimes found to be defective. Not only i`s` the cost of manufacturingordnary types of corner bead relatively high because of the intricate and 'expensive machinery necessary for their pro i duction, but `the cost of these corner beads is -also necessarily maintained at a high gure be cause of the amount of metal required for their production. The present invention contemplates the manufacture of a corner bead which will have all the advantages inherent in expanded metal corner beads, While eliminating the undesirable `featui es. To this end a tubular or other shape nosing is attached to the apex of anvangular strip of suitable ,perforated metal, but preferably expanded metal, by suitable means such p as soldering. f

`united to lform metallic reinforcements.

Another object of the invention is to provide a metallic corner bead in which a separate nos- Ving is soldered to a' separate angular Wingv section; also to improve metallic reinforcements and their manufacture in other respects hereinafter specified and claimed.

Reference is to be had to the accompanying drawings forming a part of this specification, in which.-

Fig. 1 is a plan view of the feed end 0f an apparatus for carrying out the steps of the invention,

Fig. 2.is a continuation Vof the plan View of Fig. 1 and shows thefinishing end of the appa- Fig. 3 is a sectional elevation taken on line 3 3 of Fig. 1, and illustrates'details of the con- 5 veyor means for ldelivering the nosing sections to the assembly means,

Fig. 4 is a sectional elevation taken on line 4 4 of Fig'. l, and showsdetails of the wing forming compression roll assembly, 10

Figs-.5 is a sectional'L elevation, taken on line 5 5 of Fig. l, showing the finall pass in the series of wing-forming compression rolls,

Fig. 6 is a sectional elevation of the means for assembling the bead and metallic angle, taken 15 on line 6 6 of Figs. 1 and 2, with certain parts removed to simplify the illustration,

Fig. 7 is a-sectional elevation, with parts broken away,lof the means for uniting and ironing `the finished corner bead, `taken on line 1 1 of Fig. 2.

Fig. 8 is a sectional elevation of guiding means for the tube forming assembly, taken on line 8 8 of Fig. 1,

Fig. 9 is a sectional elevation of bath, taken on line 9 9 of Fig. 1,

Fig. 10 is a sectional elevation of the solder bath for coating the tubing, taken on line Ill vll) of Fig. 1,

Fig. 11 is a sectional elevation of the finishing or .pressure roll assembly, taken on line H Il of Fig. 2,

Fig. l2 is a fragmentary elevation of a modified form of press roll construction; .and

Fig. 13 illustrates the type of corner bead which may be fabricated according vto the present inthe fluxing Vention'.

In its simplest embodiment, the method of the present invention comprises soldering a nosing, preferably rounded, to the apex. of an angular strip of suitable perforated material, such as 40 expanded metal to form a. corner bead for use in building construction. The method preferably includes the 'shaping of flat strips of the perforated material into the desired angularity, the shaping of at strips of suitable unexpanded metal into tubular form for the nosing, and the uniting of the tubular nosing to the apex of the angular strips. The shaping steps are preferably simultaneous and continuous sothat the tubular element and the angular element may be brought together to be united without loss of time.

The preferred form of apparatus for carrying l out the ydescribed method comprises means'for shaping the perforated material into angular form, means for forming` the tubular nosing, 55

means for assembling the nosing and angular material, and means Ifor permanently uniting the nosing to the apex of the angular material.so as to provide a finished corner bead. The apparatus is preferably constructed so that all the parts operate in properly timed sequence and so that the finished corner bead is rapidly and continuously produced.

The means for pressing the perforated material into angular form comprises a forming roll table I0, supported upon suitable framework (Fig. 4) and having adjustable. guide means .I2 at one end for guiding a strip of perforated material I3. The strip I3 is fed to a succession of sets of forming rolls to form the strip into a pair of angularly disposed wings |5 (Fig. 13), the number of sets of forming rolls through which the strip must pass to completion of the desired angular shape depending on the rigidity of the material of the strip. Each preliminary set of forming rolls comprises a. center forming roll I1 having its p-eriphery tapered towardthe center to form bevels I8, and a pair of compression rolls I9 and 20, the peripheries of which are beveled to complement the bevels |8. The degree of bevel will, of course, be governed in each instance by the relative position of the pass which each set of rolls constitutes. Thus, the` bevels I8 will be more nearly horizontal in the first pass than in the succeeding pass or passes. Each roll |1 is carried on a shaft 2| journaled in suitable bearings 22 which are mounted on channel strip support members 23, said members 23 being secured along the longitudinal edges of table. I0. Each roll I9 is secured to a shaft 24 which is journaled in bearings 25 and 26, said bearings being mounted on cross frame members 21 and 28, respectively. The lower end of shaft 24 has affixed thereto a bevel gear which engages with a similar gear 3I secured to a drive shaft 32, the latter being rotated by motor 33 acting through a speed reducer or transmission 34. A bevel gear 35 is secured to shaft 24 above roll I9, and meshes with bevel gear 36 which is secured to shaft 2|, whereby said shaft 2| and roll I1 are rotated upon rotation of shaft 24. Another bevel gear -31 carried by shaft 2| meshes with a bevel gear 38 secured to the upper end of a shaft 39 on which roll 2|) is keyed. Thus, a singlesource of power serves to drive all the rolls in unison. The forming rolls serve not only to press the strip I3 into the desired angularity, but also to draw the same through the successive passes.

The. last set of forming rolls through which strip I3 must pass is preferably somewhat modified in order to flattenP the apex of the angle formed in said strip so as to provide a seat for the nosing to be attached thereto. By referring to Fig. 5, it will be seen that the periphery of center roll 40 is provided with a flattened surface 4| concentric with the axis of the roll. A pressure roll 43 is rotatably supported under table Ill and extends up through an aperture 44 in said table to contact with the under side of the winged strip |30. as the same passes under roll 40, thereby pressing apex 45 of the strip against the flattened periphery 4| of roll 40 and flattening the apex 45 to facilitate attaching the corner bead nosing thereto, as will become more apparent as the description herein proceeds. While the flattened periphery 4I of roll 49 is illustrated with considerable prominence, it is to be understood that in vvpractice this may actually be no greater than 115 of an inch, more or less, to serve the desired purpose. As the formed wing strip |3a leaves the last set of forming rolls it is Aurged to the right as viewed in Fig. 1, and means to be hereinafter described are provided to receive `the wing strip and move it forwardly. A bevel gear 46 is attached to the end of drive shaft 32 and meshes with a similar gear 41 attached to a sprocket 41a through which power is transmitted for driving a longitudinal, single chain endless conveyer 48 which engages over a pair of spaced sprockets 49 and 50. Sprocket 50 is secured to a shaft 5| journaled in a pair of take-up bearings 52 which are adapted for adjusting the tension of chain 48. Bearings 52 are supported upon suitable framework 53, and shaft 49a, to which sprocket 49 is secured for rotation, is journaled in bearings 52a which are mounted upon framework 54. A sprocket 53a is secured to the end of shaft 49a and a chain 54a engages over sprockets 41a and 53a in driving relation.. At suitable intervals lugs 55 are provided on conveyer chain 48 to engage the rear end of winged strip |31; to insurecontinuous forward movement of the strip.

A nosing 51 for the corner bead is preferably tubular in form so that two coextensive, adjacent sections of corner bead may be joined by connecting means, such as a double pointed pin 58 (Fig.k 13). In practice it has been found desirable to provide an inside diameter for the nosing 51 substantially equivalent to the diameter of the body of an eight-penny nail as that is generally the most common 'size nail used in building construction and therefore convenient for use as described when the head has been removed. Where desired, of course, a solid nosing may be provided, wire of suitable gauge serving well for the purpose.

. In the preferred form of apparatus, means are preferably provided for shaping the tubular nosing 51 coincident with the formation of the winged sections |3a. Therefore, blanks 60 of thin, strip sheet metal are fed between suitable guide means 6| to a series of shaping rolls 82 which serve to shape the metal strips 50 into tubular form. The formed tubular sections 51 are pushed one after the other through a series of annular guides 54 which are mounted upon suitable framework and are substantially circular in cross section. Tubes 51 are supported by guides 64 and are prevented from sagging while being directed to a guide B1 mounted on or adjacent flux tank 68. A pair of fiuxing rolls 10 dip into fluxing bath 1| and 'serve to flux the tube sections 51 as said sections ride between said rolls (see Fig. 9), in order to prepare said sections for receiving a coating of solder. The rolls 10 are preferably so positioned that the tube sections 51 are in substantial frictional contact therewith and will be rotated in a direction opposite to the rotation of rolls 10. As seen in Fig. 9, this rotation will be clockwise as the rolls 1|J rotate counterclockwise, thus insuring a thorough flux application to said tube sections. Tubes 51 are then directed through a guide 12 on the far edge of tank 68, and through a guide 14 on the edge of a tank 15 (Figs. 1 and 10) which contains liquidI solder 11. An exterior casing 19l surrounds tank 15 to provide a heating chamber 80. A gas pipe 8| delivers gas to a burner 82 positioned beneath tank 15 to provide the heat necessary for keeping solder 11 in a molten state. Tubing 51 rides in contact with solder coating rolls 83 in a manner similar to that described in connection with the uxing'operation, whereby said rolls 83, which dip into solder '11, will supply thetubing with a thin, uniform coating of solder. Rolls I0 are preferably positioned in staggered arrangement and are carried by shafts l 10a, whichare suitably journaled in the ends of tank; and rolls 83 are similarly arranged and i' secured` to shafts 83a which are journaled in the endsv of tank15. Shafts .10a and 83a"are':p'ref erably coaxial and joined together at `their adjal cent" ends in any suitable manner forrotation in unison, but maybe joined by means of pins extendingthrough the hubsofa pair of twin gears 84.` 'Gears 84 are rotated counterclock wise in unison; as'viewed in Figs. 9 and 10, by a 'pinion 85 which is carriedby a shaft 84a to which there' is secured a pulley 85a which is rotatably drivenclockwise by any suitable source of power, such asa lmotorll, through a belt 85a.

NAfter receiving the coating, of solder, nosing members 51 pass through aguide 81 on the far endv of tank 15, and then through a guide 88 on the edge of alsectional'deliverytable V89 which issupported by a .`conveyor frame 90, the conveyor being adapted to transfer the nosing mem# bers 51 to conveyor chain 48, whereby lto bring the nosing members and wing sections |3a into.

assembled relationship preparatory to uniting the same. A shaft 92 is journaled in suitable bearings 93, which aremounted adjacent the right end of the conveyor frame 90, as viewed in Fig. 3, and carries a plurality of sprocket wheels 94 over which are engaged endless chainsY 95. At theleft hand end of conveyor frame 95,

. is provided longitudinally of table 89 to serve as a guide `for receiving the sections 51. `A motor |03 operating through a suitable speed reducer '|84 and'drive chain |05, serves to drive a sprocket Wheel |05 which is attached to shaft 92 and thereby rotate sai'd shaft to drive the conveyor chains 96. These chains 96 are provided at intervals with lugs |08 adapted to engage the successive sections of nosing tubing 51 and carry the same,

out of groove |02 in table 89 to the left, as seen in Fig. 3, to deposit said sections in a chute H0, comprising a slide and a guard or guide ||2. Members and ||2 may be continuous or sectional, as desired. Chute ||0 preferably extends along theentire delivery end of conveyor frame 90 or even somewhat beyond eachside of the conveyor frame. Chute I0 serves to direct secv tions -51 into a bed or channel ||4 in chain `conveyer 48, said channel ||4 being formed-by the raised sides 48a' of alternate links of chain 18.`

Suitable means, s'uchas rollers ||3, ar-e provided to prevent sagging of chains 96 as the same carry 'l sections of nosing 51 to said chute H0;

Wing section |3a is carried apex downwardly above conveyer chain 4,8 in a bottomless guideway formed by member ||2 and a plate or a series of plates or fingers ||5, said members ||2 and ||5 being inclined toward each other and the channel I4. 4Apex 45 of section |3a is preferably held out of contact with conveyer 48 suiiiciently to 'permit a nosing section 51 to be deposited from chute ||0 into channel ||4 under the apex 45. By virtue of the impelling force of the nal set of forming rolls, the wing section |3a will be pushed along the guideway formed by members ||2 .and ||5, untilthe forward end of said wing section is engaged by a friction roll ||6, the latter being secured to a shaft ||1 ro- |23 vmounted Aon framework 53.

tatably'suspended from brackets ||8 which. are attached to the ceiling or other suitable support.

-Roll ||6 is preferably made of semi-flexible rubber, compressed ber, or other suitable friction material, and engages the inner `facesof the` 5 wings 5'of the angular wing section |3a to continue the onward movement of said lsection after the rearend thereof has left they final forming rolls. .A pair of idler rolls Illia` are mounted .l substantially vin a plane with members l2 and l0 ||5 onveach sideof sectionlila and inengagement with the outer faces of wings I5, vwhereby to provide a frictionless surface adjacent roll I I5 over which section |31l will ride when in contact with'roll H5. A sheave or pulley ||8a is at l5 tachedto the end ofshaft |I1Vand is engaged by adrive fbelt ||9, which engagesat itsvother end over a pulley or sheave |9a secured to shaft 49a. In order to allow a suiiicient ,interval between successive wing sections |3a to permit lugs 20 to enter between said sections and engage theA rear end of the forwardmost' ofsaid sections, the speed of the chain 48 is preferably somewhatV greater than theperipheralspeed of the wing' forming rolls; and roll |-I6 is made toV rotate at 25v a slightly slower rate of speed than conveyer 48 but-still faster than the wing forming rolls.

Thus, as soon as a wing section |3a is engaged by roll ||6, the forward movement of said Wing section will be somewhat accelerated anda gap 30 is formed between the end ofv this wing section and the one following. A lug 55, which is preferably spaced on conveyer chain 48 in timed relationship with the Wing section, will then engage the rear end of the wing section 4to carry the 35 same forward. Roller ||6 is preferably freely rotatable counter-clockwise, as Aviewed in Fig. 6,-V and suitable ratcheted driving means within or externally of the rollis provided forv this purpose, so that after lug 55 has engaged the end l0v of a wing section |311, the same may be carried forward without impediment. In this way, should lug 55 not immediately engage the end of section |3a, said lug will in short order overtake the wing section inasmuch as roll H5 moves said 45 section forward somewhat more slowly than the l travel of conveyer chain /48. In order to oper ate upon different lengths of wing section from time to time, brackets -llare preferably removably fastened so that roll H6 may be moved 50 as required. As an alternative a plurality of rolls ||6 may be provided to operate upon different lengths of wing section, the rolls not needed for the particular length at `the time being manufactured being rendered inoperative.

After a nosing section 51 is delivered to con'- veyer 4'8, it is carried forward until the forward end of said'nosing section engages a'stop |20' pivotally secured to a bracket Il attached to a cross arm |22, which issupported by standards A hair spring |24, gravity control, or the like, normally holds the stop |20 fast against a stop rod |25, the spring or control |24 being sufficiently resistive to halt the movement of a nosing section 51V until 65 a wing section |3a has been urged by a lug: 55 into alignment with said nosing' section. The wing and nosing sections arepreferably of equal length, so that as the end of the 'wing sectionV 'Thereupon the corner bead assembly y.is pushed toward the right, as viewed in Figs. 2 and 6, ltoward means for uniting the same.

There is preferably interposed in the path of the corner bead assembly a suitable fluxing means to prepare said bead assembly for soldering. This may comprise a flux tank |26 and a rotary uxing brush |21 which is rotatably mounted in tank |26 and is adapted to coat the junction of the nosing 51 and apex 45 of wing section |3a preparatory to soldering the nosing to the wing section. Other means such as a flux spray orV jet may be employed alone or in combination with brush |21 for this purpose. After passing over the fluxing brush |26, the bead assembly passes in succession through a series of finishing rolls and means for applying heat and solder for uniting the parts of the corner bead. As shown in the drawings, there are provided a plurality of similar central pressure rolls |28 secured to shafts |28 which are joumaled in suitable bearings in journal blocks |30, said blocks being supported between suitable compression springs |3I. Suitable adjustment means, such as screws |33 and compression beads |34 are provided for regulating the compression of springs |3| and thus the pressure with which rolls |28 will be forced to bear against wing section |3a. This arrangement permits of relatively fine adjustment of the effective pressure exerted by any of the rolls, as may from time to time become desirable. A pair `of side pressure rolls |35 engage the outside faces of wings I5 of section |3a to press'the same against the center pressure roll |28 whereby to straighten said wings I5. It is very important in practice to have the corner bead just as true as possible.

A motor |31 is connected with speed reducer |38 and supplies power for rotating rolls |28 and rolls |35. A drive chain |39 engages over a sprocket wheel |40 on the 'end of one of the shafts |29 which carries a roll |28, and each shaft |29 has a sprocket wheel |4I on an end over which an endless chain |42 engages to connect all the shafts |29 for rotation in unison. A bevel gear |44 on a drive shaft |45 engages with transmission gear |46 outside of speed re` ducer |33 for rotating said shaft |45; and a series of bevel gears |46 engage with bevel gears |41 on shafts |48 to which the right hand rolls |35 (Fig. 1l) are keyed for rotation. A chain |49 engages over a suitable sprocket wheel on shaft and one on a shaft |50 to coordinate rotation of said shafts. A shaft |52, to which left hand roll |35 is connected, and which is geared to shaft |53 through a bevel gear |53 which meshes with a gear |54 on said shaft |56, will be driven in unison with shaft |48. A grooved roll |56 is rotatably mounted below each roll |28 and engages nosing 51 to press it firmly against the apex 45 of wing section |3a. These rolls |56 are secured for rotation to shafts |5Ga which have secured to one end a bevel gear |51 which meshes with a similar gear |58 secured to shaft |48. In this manner, there will be coordinate rotation of all the cooperatingl finishing rolls |28, |35 and |56. Peripheral apex |59 of rolls |28 is somewhat flattened so as to press the apex 45 of wing section |3a firmly against nosing section 51.

As the corner bead assembly leaves the first set of finishing pressure rolls a gas heater |66,

supplied with gas from a pipe I 6|, impinges a series of flame jets |62 upon the nosing 51 and the apex portion of section |3a whereby to heat the same, and soften the solder on said nosing 51. A strip of solder |64 is fed from a roll |65,1which is supported upon suitable standards |61, to a point directly above the desired union line of nosing 51 with apex 45 of wing section |3a. It is desirable to provide a timed impelling means in the form of driven rollers |68 to feed solder |64 as required. A torch |69, supplied with gas fro-rn pipe |61, impinges a flame upon the end of strip solder |64 to liquefy the same and allow it to deposit at the line of union between the nosing and wing sections. The soldered corner bead then passes through another set of nishing pressure rolls to further straighten and align the united wing and nosing sections. At this stage, the roll |28 may be in the nature of a Swedish iron, that is, it may be hollow and suit? ably heated, so as to provide a sweating action to take'place between the corner bead elements to insure a proper union of nosing 51 to wing section |3a. An air jet I1| then impinges upon the formed corner bead to chill the solder and prevent the joint from loosening, and after passing through another set of pressure rolls, a mild flame is directed from jet |12 against the corner -bead to soften any excess solder or beads that may have formed on the finished product, whereby` a Wiper orr cleaner |14 may remove the same. After passing through the final set or sets of finishing rolls, the finished corner bead is delivered to table |15 for further handling as desired.

Instead of using the sort of finishing pressure roll assembly shown in Fig. 11, in which there is a center pressure roll |28, side or wing pressure rolls |35 and grooved pressure roll |56, there may be substituted a male pressure rolll |11 and a female pressure roll |18, of the type illustrated in Fig. 12, to serve the same purpose. Similarly, rolls of this type may be substituted for the sets of wing forming rolls, shown in Figs. 4 and 5.

In operation, a strip, or a succession of strips, of expanded metal I3 is fed to a graduated series of forming rolls mounted upon a suitable work stand or table ID. Said rolls may comprise a center roll I1 and side or wing rolls I9 and 20, or rolls of the type shown in Fig. 12, in which suitable male and female rolls or dies are provided, whereby to form the strips I3 into winged or flange sections |3a having a pair of wings I5. Flattened peripheral apex 4| on roll 40 of the last set of forming rolls, cooperating with pressure roll 43 flattens apex 45 of Wing section |3a to provide a good seat for receiving a nosing 51.

Simultaneously with the formation of the Winged sections |3a, strips 6|] of thin sheet metal are fed to a series of shaping rolls 62 to form said strips into tubular shape to pro-vide nosing sections 51, the sections being carried through guide dies 64 to a fluxing bath 1| where a pair of fluxing rolls 10 operate on the .tubes 51 to thoroughly flux the same preparatory to receiv- 4solder is preferably applied very thinly to the tubes 51, and serves to substantially close the joint formed during manufacture and' to prepare P the tubing for'ready reception of solder |64 applied during the operation of uniti-ng a nosing section 51 to a wing section |3a. The coating of solder also prevents the nosing from uniting when applied in a, finished wall. Eventually, the

nosing sections 51 are delivered to delivery table 89 on conveyer frame 80, where each section 51 in succession is engaged by lugs |08 on a plurality of spaced conveyer chains 96. Chains 98 travel in a plane slightly below the bottom of the groove |02 in which the sections 51 travel onto table 89, whereby the transverse movement of the sections 51 onto said table is not impeded and each individual section 51 will be completely in position on the table 89 before' lugs |88 engage the same. i

A friction roll ||6 engages wing sections |3a after said sections have passed out from under the final forming roll 40 and somewhat accelerates the movement thereof so that a gap will be having sides |2 and ||5. .Said guideway extendsv coincident with a longitudinal, single chain con- Iveyer 48 provided with a groove I |4 into which proper condition' for receiving solder nosing sections 51 are deposited from chute ||0 as said sections are delivered .by conveyer 90. The nosing sections 51 are carried forward by the conveyer 48 and wing sectionsV |3a are urged \forward by lugs 55 on the co-nveyer 48, until said wing and nosing sections are laligned against Suitable stop means |20, which prevents forward movement beyond a certain point of a nosing section 51 -until alignment of the end thereof with the end of a wing section |3a is secured, whereupon said stop |20 is tripped and the corner bead assembly is carried forward to pass over tank |26 containing a fluxing bath which is applied to the corner bead assembly by a rotary 'brush |21 or other suitable means. The corner bead assembly, comprising nosing section 51' and wing section |3a, then passes through a gang of finishing pressure rolls comprising center vroll |28, wing rolls |35, and lower pressure roll |56. Intermediate the preliminary and following pass throughthe finishing rolls heat isapplied to the nosing 51 and apex 45 of wing section |3a by gas jets |62 to put the bead assembly into |64 to unite the wing and nosing sections. The uniting action is'completed by the next pass through the finishing rolls, in which roll |28 may be heated to sweat together the nosing and wing sections.

As the completed corner bead travels on through .the final passes of the finishing rolls, anair jet delivered from a pipe |1| chillsv the solder which ,has been liquefied by the sweating action, the solder is'partially fused .again by gas jet |12 and a wiper |14 cleans off excess solder. The finished corner bead is delivered to a suitable table |15, which may be an extension of the finishing roll table, as shown.

4It should be observed that with only slight changes the apparatusdescribed is adaptable to form and unite nosing sections other than tubular or round. Moreover, while the illustrated embodiment of the invention shows the nosing 51 being united to the downwardly extending apex 45 of wing section |3 a, it should be understood that the reverse arrangement or a sidewise arrangement may be adopted where desired.

It is apparent that my` invention provides an improved corner bead which is economical and simple to manufacturel and which is suitable for all uses to which known types of corner beads are adapted. In addition, the corner bead of my invention lends itself very readily to the formation of arched effects by merely severing the wings I5 transversely to adjacent the nosing 51 whereby the nosing may be bent to any desired angle. This feature also finds particularv applicability where two corners requiring corner bead converge, where, with my improved corner bead, it is only necessary to sever the wings l5 as described and bend nosing I5 to the required angularity, thus providing a continuous connection which will prevent a crack from forming at the corner convergence.

Wherever the term sweating is used in the following claims, it should be construed as including either the narrow significance of the term or theoperation of soldering together manifestly, lthe same maybe considerably varied without departing from the spirit of the inven-.

tion as defined in the appended claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patentr 1. A corner'bead comprising a strip of expanded metal bent llongitudinally to angular formto provide a pair of Wings, the apex of the angle thus formed being flattened, and a tubular nosing soldered to said flattened angle, said nosing providing means whereby to receive a connecting pn to connect coextensive, adjacent sections of corner bead.

2. A corner bead comprising reticulate, metallic wings and a separately formed nosing member, said wings and nosing4 member being joined by soldering, said nosing member being formedl vto provide means for receiving Ia connecting member to connect adjacent sections of corner bead.

3. A corner bead comprising a strip of foraminous metal bent longitudinally to angular shape to form a pair of wings, a tubular nosing positioned adjacent the apex of said wings, and a layer of solder joining, said nosing to said apex and completely enveloping said nosing 'so las to provide a rust preventative coating for said nosing whensaid nosing is exposed at the corner of a plastered room.

4. A corner bead comprising reticulate, connectedmetallic wings and a separately formed nosing member joined thereto by soldering, said nosing being coated with solder to render it rustresisting.

5. A corner bead comprising a strip of expanded metal bent longitudinally to angular form to provide a pair of wings, vand a nosing member joined thereto by soldering, said nosing member being coated with solder to render it rust-resisting.y I

6. The method of making a rust-resistant cor- I ner bead which comprises the steps `of shaping a strip of expanded metal into an angular strip `saving divergently extending wings, coating a nosing member with solder, and soldering the latter to the apex of the angle of the strip.

MICHAEL G. VASS. 

